The inner wall of the white porcelain bowl turns black and there is no poison, which may be that the quality of the bowl is unqualified. If the bowl turns black for a long time, it may not contain lead. If it is a qualified bowl, it will turn black after a long time. It is likely that the glaze on the surface of the bowl is worn. It is recommended to use scouring pad when washing dishes to avoid damaging the dishes. If it is excessively cleaned with steel balls, the glaze will be scratched and the bowl will turn black easily.

Method of washing dishes without blackening

There are many ways to wash dishes. If you have baking soda at home, you can wash the bowl with baking soda at this time. Baking soda is particularly strong in oil absorption, stronger than detergent, and also has disinfection ability, so you don't have to worry about chemical pollution when washing dishes. Washing dishes with rice washing water is also a more environmentally friendly method. The rice washing water left by parents' steamed rice can be used to wash dishes, which is simpler and more convenient.

Hot water cleaning can also remove stains from bowls. Many people like washing dishes with detergent. Actually, the detergent is full of chemicals. After washing, the ingredients of detergent will remain in the skin, which is not good for your health. So in daily life, if the bowl is not very dirty, you can choose other ways to clean it, such as hot water.

Lemonade can also be used to wash dishes. Lemon has a strong oil absorption ability, and it will have a faint fragrance after washing. At the same time, lemon is a natural fruit and will not pollute the environment.